package com.bangcommunity.bbframe.dynconfig.recipes;

import com.google.common.collect.Lists;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.atomic.AtomicValue;
import org.apache.curator.framework.recipes.atomic.DistributedAtomicLong;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.retry.RetryNTimes;
import org.apache.curator.test.TestingServer;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class DistributedAtomicLongExample {
    private static final int QTY = 5;
    private static final String PATH = "/counter/DistributedAtomicLongExample";

    public static void main(String[] args) throws IOException, Exception {
        try (TestingServer server = new TestingServer()) {
            // CuratorFramework client =
            // CuratorFrameworkFactory.newClient(server.getConnectString(), new
            // ExponentialBackoffRetry(1000, 3));
            CuratorFramework client = CuratorFrameworkFactory.newClient("127.0.0.1:2181",
                    new ExponentialBackoffRetry(1000, 3));

            client.start();

            List<DistributedAtomicLong> examples = Lists.newArrayList();
            ExecutorService service = Executors.newFixedThreadPool(QTY);
            for (int i = 0; i < QTY; ++i) {
                final DistributedAtomicLong count = new DistributedAtomicLong(client, PATH, new RetryNTimes(10, 10));

                examples.add(count);
                Callable<Void> task = new Callable<Void>() {
                    @Override
                    public Void call() throws Exception {
                        try {
                            // Thread.sleep(rand.nextInt(1000));
                            AtomicValue<Long> value = count.increment();
                            // AtomicValue<Long> value = count.decrement();
                            // AtomicValue<Long> value = count.add((long)rand.nextInt(20));
                            System.out.println("succeed: " + value.succeeded());
                            if (value.succeeded())
                                System.out.println("Increment: from " + value.preValue() + " to " + value.postValue());
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        return null;
                    }
                };
                service.submit(task);
            }

            service.shutdown();
            service.awaitTermination(10, TimeUnit.MINUTES);
        }

    }
}